CN112127746B

CN112127746B - Door body driving device and refrigerator

Info

Publication number: CN112127746B
Application number: CN201910551339.3A
Authority: CN
Inventors: 费斌; 许以浩; 程学丽; 尚亚洲
Original assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2023-04-18
Anticipated expiration: 2039-06-24
Also published as: CN112127746A

Abstract

The invention provides a door body driving device and a refrigerator, wherein the door body driving device is used for driving a door body of equipment, the door body driving device comprises a driving mechanism for driving the door body to move, a control device is arranged on the equipment or the door body driving device, the control device detects that the opening time of the door body exceeds a preset value, the control device sends an automatic door closing signal to the driving mechanism, and the driving mechanism drives the door body to close. After the opening time of the door body exceeds the preset value, the driving mechanism receives the automatic door closing signal of the control device and then drives the door body to close, so that the cold air is prevented from leaking for a long time, and the waste of electric energy and even the deterioration of precious food materials stored by a user are avoided.

Description

Door body driving device and refrigerator

Technical Field

The invention relates to a door body driving device for driving a door body to be opened and closed, and also relates to a refrigerator, belonging to the technical field of household equipment and refrigeration.

Background

The drawer door of the existing refrigerator cannot be automatically closed after being automatically opened by misoperation or after a user forgets to close the drawer door, so that cold air of the refrigerator leaks for a long time, the refrigeration effect is invalid, and the electric energy waste and even the spoilage of precious food materials stored by the user are caused.

Disclosure of Invention

The invention aims to provide a door body driving device which can automatically close a door body.

In order to achieve the above object, the present invention provides a door driving device for driving a door of an apparatus, where the door driving device includes a driving mechanism for driving the door to move, the apparatus or the door driving device is provided with a control device, the control device detects that the time for opening the door exceeds a preset value, the control device sends an automatic door closing signal to the driving mechanism, and the driving mechanism drives the door to close.

As a further improvement of an embodiment of the present invention, the driving mechanism includes a door opening driving mechanism and a door closing driving mechanism, the door opening driving mechanism and the door closing driving mechanism have the same structure, and both include a motor and a transmission member driven by the motor, the motor rotates forward to drive the door body to open, and the motor rotates backward to drive the door body to close.

As a further improvement of an embodiment of the present invention, the driving mechanism includes a door opening driving mechanism and a door closing driving mechanism, the door opening driving mechanism and the door closing driving mechanism are different in structure, the door opening driving mechanism includes a driving source, the driving source includes a motor, the door closing driving mechanism includes an elastic member, the motor drives the door body to open and stretch the elastic member, and the elastic member resets and closes the door body.

As a further improvement of an embodiment of the present invention, the door opening driving mechanism includes a first transmission member driven by the driving source, and a second transmission member in transmission cooperation with the first transmission member and driving the door body to open, and the elastic member moves along with the first transmission member.

As a further improvement of an embodiment of the present invention, after the door opening driving mechanism drives the door body to open, the first transmission member and the second transmission member are disengaged, and the elastic member is stretched to a specific position and clamped.

As a further improvement of an embodiment of the present invention, after the control device sends an automatic door closing signal to the driving mechanism, the control device controls the motor to rotate reversely for a period of time, the first transmission member and the second transmission member are reengaged, and the elastic member is disengaged from the specific position and pulls the door body to close.

As a further improvement of an embodiment of the present invention, the driving source includes a push rod driven by the motor, the push rod drives the first transmission member, and the elastic member is connected to the push rod.

As a further improvement of an embodiment of the present invention, the first transmission member is a sliding block, the second transmission member is a claw, the sliding block is provided with a cylindrical body, the door body driving device further includes a guide groove in sliding fit with the cylindrical body, the guide groove includes a first extending section and a second extending section which are mutually communicated and arranged at an angle, when the cylindrical body slides from the first extending section into the second extending section, the claw is separated from the sliding block, and the elastic member is clamped.

As a further improvement of an embodiment of the present invention, the door body is opened by a first stroke and a second stroke in succession, the first stroke is smaller than the second stroke, and the control device detects the time for which the door body is opened after the first stroke is completed.

Compared with the prior art, the invention has the beneficial effects that: after the opening time of the door body exceeds the preset value, the driving mechanism receives an automatic door closing signal of the control device and then drives the door body to close, so that the long-time leakage of cold air is avoided, and the waste of electric energy and even the spoilage of precious food materials stored by a user are avoided.

Another object of the present invention is to provide a refrigerator, wherein the refrigerator is provided with any one of the door driving devices.

Compared with the prior art, the invention has the beneficial effects that: the refrigerator can avoid the long-time leakage of cold air, thereby avoiding the waste of electric energy and even the putrefaction and deterioration of precious food materials stored by users.

Drawings

FIG. 1 is a partial perspective view of an apparatus provided in accordance with a first embodiment of the present invention;

FIG. 2 is a perspective view of a first drive mechanism in the apparatus shown in FIG. 1;

FIG. 3 is a perspective view of the slide rail and a second drive solid in the apparatus shown in FIG. 1;

FIG. 4 is another perspective view of the slide rail and the second driving solid in the apparatus shown in FIG. 1, wherein the signal detection device is hidden;

FIG. 5 is a perspective view of the signal detection device and a portion of the second drive mechanism of the apparatus shown in FIG. 1;

FIG. 6 is a perspective view of one side rail of the apparatus shown in FIG. 1, with the rail in a retracted state;

FIG. 7 is a perspective view of one side rail of the apparatus shown in FIG. 1, with the rail in an extended position;

FIG. 8 is a partial perspective view of an apparatus provided by a second embodiment of the present invention;

FIG. 9 is a perspective view of the slide and drive mechanism of the apparatus shown in FIG. 8, with the slide in a retracted state;

FIG. 10 is a front view of the slide and drive mechanism of the apparatus shown in FIG. 9, with the housing of the drive source hidden;

FIG. 11 is a front view of the track and drive mechanism of the apparatus of FIG. 8, wherein the housing of the drive source is hidden, the track is partially extended, and the first and second transmission members are in engagement and disengagement thresholds;

FIG. 12 is a front view of the slide and drive mechanism of the apparatus of FIG. 8, wherein the housing of the drive source is hidden, the slide is fully extended, and the first and second transmission members are disengaged;

FIG. 13 is a partial perspective view of an apparatus provided in accordance with a third embodiment of the present invention;

FIG. 14 is a front view of the slide and drive mechanism of the apparatus of FIG. 13, with the slide in a retracted position and the cylindrical body of the slide engaging the first extension of the guide slot;

FIG. 15 is similar to FIG. 14, except that in FIG. 15, the guide and a portion of the housing of the drive source are hidden;

FIG. 16 is a front view of the track and drive mechanism of the device of FIG. 13, with the track partially deployed; the cylindrical body on the sliding block is matched with the second extension section of the guide groove, and the clamping jaw and the sliding block are in a critical state of engagement and disengagement;

FIG. 17 is similar to FIG. 16, except that in FIG. 17, the guide and a portion of the housing of the drive source are hidden;

FIG. 18 is a front view of the slide and drive mechanism of the device shown in FIG. 13, with the slide fully extended; the slide block and the clamping jaw are positioned in a separated state;

FIG. 19 is similar to FIG. 16, except that in FIG. 19, the guide and a portion of the housing of the drive source are hidden;

FIG. 20 is a partial front view of a drive mechanism and a slide rail provided in accordance with a fourth embodiment of the present invention;

fig. 21 is similar to fig. 20, except that in fig. 21, a part of the housing of the drive source is hidden.

Wherein, 100-equipment; 102-a body; 104-a housing space; 108-a drive mechanism; 110-a first drive mechanism; 112-a push rod; 114-a motor; 116-a first, bi-directional, clutched gear set; 120-a second drive mechanism; 121-a first transmission member; 122-a second transmission; 123-a drive source; 124-a motor; 125-a first gear; 126-a rack; 127-a second bi-directional clutch gear set; 130-a slide rail; 131-orbit determination; 132-a middle rail; 133-upper rail; 134-connecting rod; 142-a second gear; 144-an encoder; 146-a PCB board; 148-signal lines.

200-equipment; 208-a drive mechanism; 212-a push rod; 214-a motor; 221-a first transmission piece; 222-a second transmission member; 223-a drive source; 225-a first gear; 226-rack; 228-a first rack; 229-a second rack; 230 a slide rail; 231-orbit determination; 233-upper rail; 280-a support part; 281-a rotating shaft; 290-a microswitch; 291-PCB board.

300-a device; 308-a drive mechanism; 312-a push rod; 314-a motor; 321-a first transmission piece; 322-a second transmission; 323-driving source; 330-a slide rail; 331-orbit determination; 333-upper rail; 360-a guide groove; 361-a first extension; 362-a second extension; 363-a guide; 370-an elastic member; 371-the slide block; 372-a slide; 373-a card member; 374-card slot; 375-cylindrical body; 376-jaws; 390-a microswitch; 391-PCB board.

412-a push rod; 460-a guide groove; 461-a first extension; 462-a second extension; 471-a slider; 473-clamping piece; 475-a cylindrical body; 476-jaws; 490-micro switch.

Some embodiments of the invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same or similar parts or portions are denoted by the same reference numerals in the drawings. It will be appreciated by those skilled in the art that the drawings are not necessarily to scale, such that certain dimensions of structures or parts may be exaggerated relative to other structures or parts as appropriate for ease of illustration, and thus the drawings are intended to illustrate only the basic structure of the subject matter of the present application.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

It is to be understood that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

Fig. 1 to 7 show an apparatus 100 according to a first embodiment of the present invention, and a door driving device for driving a door of the apparatus 100 to move.

Referring to fig. 1, the present embodiment provides an apparatus 100, where the apparatus 100 includes a main body 102 and a door (not shown), the main body 102 is formed with an open receiving space 104, and the door can close the receiving space 104 and form a part of an outer surface of the apparatus 100.

In the present embodiment, the apparatus 100 is a refrigerator, and those skilled in the art can understand that, besides the refrigerator, other apparatuses 100 having the above-mentioned features, such as a medicine cabinet and a wine cabinet, can also use the technical solution of the present embodiment, and all the solutions that are the same as or similar to the present embodiment are covered in the protection scope of the present invention.

In the present embodiment, the door may be a door that simply closes the housing space 104. Or a drawer door body. Or the two are combined, that is, the door body can close the accommodating space 104 and form part of the outer surface of the device 100, and meanwhile, a drawer moving along with the door body is arranged in the door body, and the drawer can be separated from the door body. Any embodiments similar or equivalent to the embodiments are also within the scope of the present invention.

The apparatus 100 further comprises a door driving device, which includes a driving mechanism 108 for driving the door to move, so as to open or close the door, thereby facilitating a user to store articles in the accommodating space 104 or take articles out of the accommodating space 104.

Taking the refrigerator as the device 100, the middle and high-grade refrigerators in the market at present have relatively large volume, large door seal suction force and heavy load of drawers, and more users feed back the refrigerator door body to be difficult to open, especially the drawer door body of the refrigerator.

Effectively open a body, actuating mechanism must provide great power of opening the door for the door body, and great power of opening the door leads to the in-process of opening the door all the time, knocks down old man and child easily, causes the injury.

In this embodiment, the driving mechanism 108 drives the door body to open through the first stroke and the second stroke in succession, and the door opening force applied to the door body by the driving mechanism 108 in the first stroke is larger than the door opening force applied to the door body by the driving mechanism in the second stroke.

The drive mechanism 108 includes a first drive mechanism 110 and a second drive mechanism 120. The first drive mechanism 110 and the second drive mechanism 120 are spaced apart. The first driving mechanism 110 drives the door body to open along the first section of stroke, and the second driving mechanism 120 drives the door body to open along the second section of stroke.

That is to say, in the door opening process, the first driving mechanism 110 acts on the door body before the second driving mechanism 120, that is, the first driving mechanism 110 realizes the first stage driving, and the second driving mechanism 120 realizes the second stage driving. In the present embodiment, the driving stroke of the first driving mechanism 110 is smaller than the driving stroke of the second driving mechanism 120. That is, the first driving mechanism 110 opens the door body by one seam first, and the second driving mechanism 120 continues to open the door body by a larger degree.

In the present embodiment, the door opening force applied to the door body by the first driving mechanism 110 is preferably larger than the door opening force applied to the door body by the second driving mechanism 120.

Thus, the first driving mechanism 110 can provide a large door opening force at the initial stage of opening the door body, so as to overcome the door sealing suction force and the drawer load and effectively open the door body, and provide a small door opening force at the later stage of opening the door body, so as to prevent the user, such as an old man or a child, of the device 100 from being knocked down during the opening process of the door body.

The amount of door opening force provided by the first drive mechanism 110 and the second drive mechanism 120 may be achieved through power selection, structural design, and the like.

Referring to fig. 1 and fig. 2, in the present embodiment, the first driving mechanism 110 includes a push rod 112, and the push rod 112 directly pushes the door body.

The push rod 112 directly pushes the door body, so that the acting force of the first driving mechanism 110 can be most effectively and directly acted on the door body, and a large door opening force is provided at the initial opening stage of the door body, and the door body is further effectively opened.

In the present embodiment, the push rod 112 of the first driving mechanism 110 pushes the lower middle position of the door body to prevent the first driving mechanism 110 from occupying the accommodating space 104, and those skilled in the art can understand that the position of the first driving mechanism 110 can be set as required, and all the schemes that are the same as or similar to the present embodiment are included in the protection scope of the present invention.

The first driving mechanism 110 includes a motor 114 and a transmission body for driving and connecting the motor 114 and the push rod 112.

In the present embodiment, the specific structure of the first driving mechanism 110 is the same as that of the automatic door opening device disclosed in WO2018121570A1 of the applicant's prior application, and is not described again. The entire disclosure of WO2018121570A1 is incorporated by reference into the description of the present application.

The transmission body of the first driving mechanism 110 includes a first bidirectional clutch gear set 116, and when the apparatus 100 is powered off or the door body is stressed, the first bidirectional clutch gear set 116 is in a slipping state.

When the refrigerator is suddenly powered off or a user manually pulls and pulls the door body, the first bidirectional clutch gear set 116 is always in a slipping state, the motor does not work, the user can manually close the door body normally by using small thrust, and the damage of external applied impact force to the motor is effectively avoided.

Referring to fig. 1, fig. 3 and fig. 4, in the preferred embodiment, the door driving device includes a sliding rail 130, the door is connected to the sliding rail 130, and the second driving mechanism 120 drives the sliding rail 130 to drive the door.

In this embodiment, the door body is connected to one end of the slide rail 130, which can extend out of the accommodating space 104, so that when the second driving mechanism 120 drives the slide rail 130 to move, the door body is opened or closed along with the movement of the slide rail 130.

In this embodiment, the number of the slide rails 130 is two, and the connecting rod 134 is arranged between the two slide rails 130, so that the synchronous movement between the two slide rails 130 is more accurate, and the movement of the door body is more stable and smooth.

As will be appreciated by those skilled in the art, since the door body is connected to both of the two slide rails 130, the door body itself can also function to connect the two slide rails 130 and make the two slide rails 130 move synchronously. Therefore, the connecting rod 134 is not disposed between the two sliding rails 130, and all the embodiments that are the same as or similar to the present embodiment are covered by the protection scope of the present invention.

In this embodiment, the sliding rail 130 is a metal sliding rail 130, and the connecting rod 134 is a steel shaft, so that the bearing capacity is higher, and the service life of the product is longer.

In this embodiment, the slide rail 130 is a three-section synchronous slide rail.

The three-section synchronous sliding rail 130 includes a fixed rail 131 fixed relative to the device 100, a middle rail 132 slidably coupled to the fixed rail 131, and an upper rail 133 slidably coupled to the middle rail 132. The door body is connected to one end of the upper rail 133 extending out of the accommodating space 104. The specific structure of the three-section synchronous sliding rail can refer to the prior art, and is not described in detail herein.

Referring to fig. 5, fig. 6 and fig. 7, in the present embodiment, preferably, the second driving mechanism 120 includes a driving source 123, a first transmission member 121 driven by the driving source 123, and a second transmission member 122 engaged with the first transmission member 121 in a transmission manner, and the second transmission member 122 is fixed relative to the slide rail 130.

Therefore, the driving source 123 drives the second transmission member 122 to move through the first transmission member 121, and the second transmission member 122 moves to drive the sliding rail 130 fixed relative to the second transmission member to move, so as to finally drive the door body to move.

In this embodiment, the second transmission member 122 is fixed relative to the middle rail 132, the second driving mechanism 120 drives the middle rail 132 to move, and the middle rail 132 drives the upper rail 133 to move accordingly, so as to finally drive the door body to move.

Specifically, the driving source 123 is a motor 124, the first transmission member 121 is a first gear 125, the second transmission member 122 is a rack 126, and the rack 126 is fixed on the middle rail 132. Therefore, the motor 124 drives the first gear 125 to rotate, the first gear 125 drives the rack 126 to linearly move, the rack 126 drives the middle rail 132 to linearly move, and finally the door body is driven to linearly move to be opened or closed.

In the present embodiment, since a transmission such as a worm gear is further provided between the motor 124 and the first transmission 121, the "first transmission 121" in the present embodiment refers to a member directly meshing with the "second transmission 122". It will be appreciated by those skilled in the art that other transmission members between the motor 124 and the first transmission member 121 are not limited to worm gears, but may be provided according to the requirement, and all the embodiments similar to or the same as the present embodiment are covered by the protection scope of the present invention.

In this embodiment, the rack 126 is fixed to the back surface of the slide rail 130. Therefore, the second driving mechanism 120 does not occupy the space between the two sliding rails 130, thereby facilitating storage and placing drawers on the two sliding rails 130. By "back of the slide rail 130" is meant the side of the two slide rails 130 that is away from each other.

In this embodiment, the second driving mechanism 120 is preferably provided with a second bidirectional clutch gear set 127, and when the apparatus 100 is powered off or the door body is stressed, the second bidirectional clutch gear set 127 is in a slipping state.

When the device 100 is suddenly powered off or a user manually pulls the door body, the second bidirectional clutch gear set 127 is in a slipping state, the motor 124 does not work, the user can manually close the door body normally by using small thrust, and the damage of external impact force to the motor 124 is effectively avoided.

The specific structure of the bidirectional clutch gear set is many in the prior art, and can be set as required by those skilled in the art, and is not described in detail.

As described above, in the present embodiment, the number of the slide rails 130 is two. The number of the second driving mechanisms 120 can be set according to needs, for example, only one second driving mechanism 120 is provided, and the second driving mechanism 120 is in transmission fit with the middle rail 132 of any one side sliding rail 130, so that the cost can be saved. Two second driving mechanisms 120 can also be arranged, and the two second driving mechanisms 120 are respectively in transmission fit with the middle rails 132 of the two sliding rails 130, so that the movement of the drawer can be more stable. When the second driving mechanism 120 is disposed on only one side rail 130, it is preferable to dispose the connecting rod 134 between the two rails 130, so that the movement of the two side rails 130 is more synchronous, and the movement of the drawer is more stable and smooth.

In this embodiment, the first driving mechanism 110 realizes the opening of the first stroke of the door body, and the second driving mechanism 120 realizes the opening of the second stroke of the door body, so that the first gear 125 and the rack 126 are not engaged in the door closing state shown in fig. 6, and after the first driving mechanism 110 drives the door body to open for a stroke, the door body and the slide rail 130 are drawn out for a distance, and the first gear 125 and the rack 126 are engaged and continue to open the door body under the driving of the driving source 123.

Those skilled in the art can think that the door driving device only includes the second driving mechanism 120, and only needs to increase the length of the rack 126 on the basis of the second driving mechanism 120 in the present embodiment, so that the rack 126 is always in the state of being engaged with the first gear 125, and all the schemes that are the same as or similar to the present embodiment are covered in the protection scope of the present invention.

In this embodiment, the apparatus 100 or the door driving device is provided with a control device, and the control device controls the operation of the driving mechanism 108, thereby controlling the movement of the door.

Preferably, in this embodiment, the control device detects whether the door body is stressed during the movement process, and if so, the control device controls the driving mechanism 108 to stop working.

In the process of opening or closing the door body, the control device detects the stress of the door body, the motion of the door body is possibly blocked, the control device controls the driving mechanism 108 to stop working, the old and the child can be prevented from being knocked down in the process of opening the door body, or the user can be prevented from being injured by clamping in the process of closing the door body, so that the injury can be avoided.

Preferably, in this embodiment, the door driving device further includes a signal detection device, after the driving mechanism 108 stops working due to stress, the signal detection device sends a signal of the door stress direction to the control device, and the control device controls the driving mechanism 108 to move in the opposite direction, that is, the control device controls the driving mechanism 108 to drive the door to move along the direction opposite to the stress direction.

The control device controls the driving mechanism 108 to drive the door body to move along the direction opposite to the force-bearing direction, so as to avoid injury, such as avoiding hitting the old and children during the door opening process, and avoiding clamping injury to the user during the door closing process.

In the present embodiment, since the first driving mechanism 110 has a small stroke, the door body is mainly driven to open in a small range (for example, one seam is opened); the second driving mechanism 120 has a large stroke and drives the door body to be opened in a large range. Therefore, after the first driving mechanism 110 finishes working, the control device detects whether the door body is stressed; and when detecting that the door body is stressed, the control device mainly controls the second driving mechanism 120 to stop working. Of course, if the stroke of the first driving mechanism 110 is larger, the door body can be forced to control the first driving mechanism 110 to stop working.

Moreover, since the motor 124 of the second driving mechanism 120 can also rotate reversely to close the door body, the control device controls the second driving mechanism 120 to drive the door body to move along the direction opposite to the force direction after receiving the signal of the force direction of the door body.

In the present embodiment, the signal detection device is connected to the drive mechanism. The signal detection means includes a second gear 142 engaged with the first gear 125, and an encoder 144 connected to the second gear 142. The signal is an angle change signal of the angle encoder 144.

The signal detection device in the embodiment has a simple structure and a reasonable design.

In this embodiment, the angle encoder 144 is a circular grating angle encoder 144, which has a simple structure and a mature process. One skilled in the art can think that other encoders can also be used to detect the door body force direction and send a door body force direction signal to the control device, and all the schemes that are the same as or similar to the present embodiment are covered in the protection scope of the present invention.

The signal detection device further includes a PCB 146 connected to the angle encoder 144, and a signal line 148 connected to the PCB 146. The signal of the angle encoder 144 is transmitted to the control device via the PCB 146 and the signal line 148.

The signal detection device functions as follows: when the door body is stressed, the door body can be pulled out or retracted for a short distance, correspondingly, the rack 126 on the sliding rail 130 moves forwards or backwards for a short distance, the rack 126 moves to drive the first gear 125 and the second gear 142 to rotate forwards or backwards, the angle encoder 144 detects an angle change signal of the second gear 142, and the signal is a door body stress direction signal, or the signal can be converted into a door body stress direction signal; subsequently, the angle encoder 144 transmits the door body force direction signal to the control device through the PCB 146 and the signal line 148; finally, the control board outputs a control signal to control the driving source 123 to output a motion opposite to the previous motion, for example, the motor 124 normally opens the door, and at this time, the motor 124 reversely closes the door. Thereby avoiding causing injury.

In the present embodiment, the motor 124 drives the drive mechanism 108 in the forward direction to open the door, and the motor 124 drives the drive mechanism 108 in the reverse direction to close the door. Those skilled in the art will appreciate that the motor 124 may be configured to rotate in reverse to open the door and the motor 124 may be configured to rotate in forward to close the door by properly designing the transmission. All the schemes similar to or the same as the present embodiment are covered by the protection scope of the present invention.

In another modified embodiment of the present embodiment, the signal detection device sends a door body force direction signal to the control device, and the control device controls the driving mechanism 108 to move in the same direction, that is, the control device controls the driving mechanism 108 to drive the door body to move in the same direction as the force direction.

The specific structure is the same as that described above, and it is not necessary to repeat the description, and only the control logic of the control device needs to be modified. It should be noted that, since the control device controls the driving mechanism 108 to move in the same direction, the driving mechanism 108 may or may not stop before the control device controls the driving mechanism 108 to drive the door body to move in the same direction as the force receiving direction.

The application scenario of the deformation embodiment is that, taking the door body opening process as an example, the motor 124 rotates forward to drive the door body to open, the door body receives outward tensile force in the door body opening process, at this time, the control device judges that the door body receives the outward tensile force according to the signal sent by the angle encoder 144, and the control device continues to drive the motor 124 to rotate forward, so that the door body continues to be driven to open, the movement direction of the door body is the same as the user expectation, and the high-end experience of the user is greatly improved.

Of course, the principle of the door closing process is the same, but the rotation direction of the motor 124 is opposite, and the description is omitted.

Preferably, in this embodiment, the control device further detects the time when the door body is opened, and if it is detected that the time when the door body is opened exceeds a preset value, the control device sends an automatic door closing signal to the driving mechanism 108, and the driving mechanism 108 drives the door body to close.

From this, when the maloperation appears or the user forgets to close the door, actuating mechanism 108 drive the door body and close, can avoid the inside refrigeration effect of refrigerator to become invalid, and then avoid causing the electric energy waste or even the precious food material corruption of user's storage is rotten.

In this embodiment, since the final output end of the first driving mechanism 110 is the push rod 112, it can only push the door body open, but cannot close the door body. Therefore, when the detection device detects that the time for opening the door body exceeds the preset value, the control device sends an automatic door closing signal to the second driving mechanism 120, and the second driving mechanism 120 drives the door body to close.

Specifically, after the second driving mechanism 120 receives the automatic door closing signal, the motor 124 rotates reversely, and drives the middle rail 132 of the sliding rail 130 to retract through the transmission of the first gear 125 and the rack 126, so as to automatically close the door.

It should be noted that, since the sliding rail 130 is provided with the self-locking device, when the sliding rail 130 is retracted and the self-locking device is triggered, the first gear 125 and the rack 126 are switched from the engaged state to the disengaged state, and the last closing stroke is completed by the self-locking elastic member of the sliding rail 130.

In this embodiment, the self-locking elastic member of the sliding rail 130 is reasonably utilized to shorten the length of the rack 126, and the structural design is ingenious and reasonable.

As described above, the door driving device is provided with the signal detection device including the second gear 142 and the angle encoder 144. In this embodiment, the control device detects that the signal detection device does not change the signal for a certain period of time, and the driving mechanism 108 drives the door to close.

That is to say, at the in-process of opening the door or closing the door, if controlling means detects a door body atress, actuating mechanism 108 stop work back, if signal detection device signal invariant in a period, it does not receive the atress for a long time to explain the door body, and the door body is in half-open state, and at this moment, actuating mechanism 108 drive door body is closed, can avoid the inside refrigeration effect of refrigerator to become invalid, and then avoids causing the precious edible material corruption of electric energy waste even user's storage.

Next, the door opening process of the door driving device of the present embodiment will be described.

Triggering a door opening key, sending an instruction to the first driving mechanism 110 by the control device, and ejecting the door body for a certain distance by the push rod 112; after the push rod 112 is ejected for a certain distance, the first gear 125 and the rack 126 are brought into an engaged state from a disengaged state.

Then, the control device sends a command to the second driving mechanism 120, and the second driving mechanism 120 drives the door body to be fully opened.

After the operation of the first driving mechanism 110 is finished, the control device may detect whether the door body is subjected to an external force at intervals, and if so, the control device controls the second driving mechanism 120 to stop working.

After the second driving mechanism 120 stops working due to external force blocking, the control device determines the force direction of the door body by receiving the door body force direction signal of the signal detection device, and controls the second driving mechanism 120 to drive the door body along the direction opposite to or the same as the force direction (according to the program preset by the control device).

The control device also detects the opening time of the door body and the signal duration time of the signal detection device at certain intervals, and if the opening time of the door body exceeds a preset value or the signal of the signal detection device exceeds a certain time and is not changed, the control device controls the second driving mechanism 120 to close the door body.

Next, the door closing process of the door driving device according to the present embodiment will be described.

Triggering the door closing key, and sending an instruction to the second driving mechanism 120 by the control device to execute a door closing action; when the second driving mechanism 120 drives the door body to close to a certain degree, the first gear 125 is disengaged from the rack 126, and at this time, the self-locking device of the slide rail 130 itself is started, and the door is closed in the last section of stroke by the resilience force of the elastic member arranged on the slide rail 130, and the section of stroke is the same as the door opening stroke of the first driving mechanism 110.

The door closing process is the same as the door opening process, and the control device can also detect whether the external force and the direction of the external force are applied and control the second driving mechanism 120 according to a predetermined program. The control device may also detect the door opening time and the signal duration of the signal detection device, and control the second driving mechanism 120 according to a predetermined program. No further description is given.

Fig. 8 to 12 show an apparatus 200 according to a second embodiment of the present invention, and a door driving device for driving a door of the apparatus 200 to move.

Referring to fig. 8 and 9, the apparatus 200, the door body, the sliding rail 230, and the connecting rod connecting the sliding rail 230 according to the present embodiment are the same as those of the first embodiment, and are not repeated.

One of the differences between the present embodiment and the first embodiment is: in the first embodiment, the driving mechanism 108 includes a first driving mechanism 110 and a second driving mechanism 120, the first driving mechanism 110 directly drives the door body, and the second driving mechanism 120 is disposed on the side of the slide rail 130 and drives the slide rail 130 to drive the door body; in the present embodiment, the driving mechanism 208 is provided only on the slide rail 230 side, and the door body is driven by driving the slide rail 230. Of course, it is the same as the first embodiment that the driving mechanism 208 is disposed on only one side of the slide rail 230 or both sides of the slide rail 230, and the description thereof is omitted.

Referring to fig. 10, 11 and 12, in the present embodiment, the driving mechanism 208 includes a driving source 223, a first transmission member 221 driven by the driving source 223, and a second transmission member 222 engaged with the first transmission member 221 and fixed on the slide rail 230.

In the present embodiment, the driving source 223 preferably includes a motor 214, a push rod 212, and a transmission body for transmitting and connecting the motor 214 and the push rod 212.

In the present embodiment, the driving source 223 is similar in structure to the first driving mechanism 110 in the first embodiment, and development cost can be saved.

Specifically, the driving source 223 is configured by adding a microswitch 290 interlocked with a link and a PCB 291 connected to the microswitch 290 to the first driving mechanism 110 in the first embodiment.

The control device collects the switching value of the microswitch 290 through the PCB 291, outputs a control signal, controls the action of the motor in the driving source 223 and finally realizes the automatic opening and closing of the door body. Specifically, when the push rod 212 is pushed to the maximum position and is returned to the initial position, the switching value of the micro switch 290 changes, and the control device detects the change and outputs a control signal to stop the motor.

The first transmission member 221 is a first gear 225. A conversion mechanism is provided between the push rod 212 and the first gear 225, which converts the translational movement of the push rod 212 into a rotational movement of the first gear 225.

In this embodiment, the switching mechanism includes a support portion 280 connected to the push rod 212, and a rotating shaft 281 rotatably coupled to the support portion 280, and the first gear 225 is fixed to the rotating shaft 281. Therefore, the supporting portion 280 moves linearly along with the push rod 212 to drive the rotating shaft 281 and the first gear 225 to rotate. The switching mechanism is simple in structure and low in cost. Those skilled in the art will appreciate that other conversion mechanisms for converting the translational motion of the rod 212 into the rotational motion of the first gear 225 may be used, and any arrangement similar or equivalent to that of the present embodiment is within the scope of the present invention.

The second transmission member 222 is a rack comprising a first rack 228 and a second rack 229 disposed opposite to each other, and the first rack 228 and the second rack 229 are equal in length. The first rack 228 is fixed to the upper rail 233, and the second rack 229 is fixed to the fixed rail 231, and as shown in fig. 10, the first gear 225 is engaged with both the first rack 228 and the second rack 229 in the door-closed state.

Therefore, the first gear 225 rotates to drive the first rack 228 and the second rack 229 to translate simultaneously, and the movement stroke of the slide rail 230 driven by the racks is twice as long as the length of the racks. The first rack 228 and the second rack 229 which are shorter can be arranged to realize a longer moving stroke of the sliding rail 230, and the structural design is reasonable.

In this embodiment, the lengths of the first rack 228 and the second rack 229 are designed such that the driving stroke of the driving mechanism 208 is smaller than the movement stroke of the slide rail 230.

That is, in the present embodiment, when the door is opened, the driving mechanism 208 drives the sliding rail 230 to move for a certain distance, the door body is automatically opened for a certain distance, and the subsequent opening of the door body is realized by manually pulling and pulling the door body by the user.

Therefore, the driving mechanism 208 can provide larger door opening force at the initial stage of opening the door body, so that the door body is effectively and automatically opened by overcoming door seal suction force and drawer load, and the problem that the door body is not easy to open is solved. After the door body is opened, the force required by the later door opening operation is small, and the door body can be manually operated by a user. The cost of the refrigerator can be saved.

In this embodiment, the second transmission member 222 and the first transmission member 221 have two engagement states, in the first state, the second transmission member 222 engages with the first transmission member 221 and drives the door body to move, and in the second state, the second transmission member 222 disengages from the first transmission member 221.

That is, as shown in fig. 10 to 11, in the first state, the driving source 223 drives the slide rail 230 and the door body to move through the first gear 225, the first rack 228, and the second rack 229, thereby automatically opening the door at the initial stage of opening the door body. As shown in fig. 11 to 12, in the second state, the first gear 225 is disengaged from the first rack 228 and the second rack 229, the driving source 223 can not drive the slide rail 230 and the door body to move any more, and the user can manually open the door body.

In the present embodiment, since the driving stroke of the driving mechanism 208 is greater than the driving stroke of the first driving mechanism 110 in the first embodiment, the control device may detect whether a force is applied during the movement of the door body while the first gear 225 is engaged with the first rack 228 and the second rack 229, as in the first embodiment, and if so, the control device controls the driving mechanism 208 to stop the movement. As in the first embodiment, a signal detection device 240 is provided on the door driving device, the signal detection device 240 sends a door force direction signal to the control device, and the control device controls the driving mechanism 208 to drive the door to move along a direction opposite to or opposite to the force direction. And will not be described in detail. The signal detection device 240 of the second embodiment has the same structure as that of the first embodiment, and is not described again.

In the process that the first gear 225 is meshed with the first rack 228 and the second rack 229, as in the first embodiment, when the control device detects that the time for opening the door body exceeds a preset value, the control device sends an automatic door closing signal to the driving mechanism 208, and the driving mechanism 208 drives the door body to close. The door body driving device is provided with a signal detection device 240, the control device detects that the signal of the signal detection device 240 is unchanged within a period of time, and the driving mechanism 208 drives the door body to close. And will not be described in detail.

As in the first embodiment, a bidirectional clutch gear set may be disposed in the driving mechanism 208, and when the apparatus 200 is powered off or the door body is stressed, the bidirectional clutch gear set is in a slipping state. And will not be described in detail.

The door opening process of the door driving device of the present embodiment is described below.

After the door opening signal is triggered, the motor of the driving mechanism 208 receives a control signal output by the control device, the motor rotates forward to drive the push rod 212 to push out, the push rod 212 translates through the conversion mechanism to drive the first gear 225 to rotate, the first gear 225 rotates to drive the first rack 228 and the second rack 229 to translate, the slide rail 230 translates, and the door body is opened for a certain distance.

When the push rod 212 is pushed to the maximum position, the control device detects that the switching amount of the micro switch 290 in the driving mechanism 208 is changed, and the control device controls the motor to stop working. At this time, the first gear 225 moves to a critical state of being disengaged from the first rack 228.

Subsequently, the user manually pulls the door body, and the first gear 225 is disengaged from the first rack 228 until the door body is completely opened.

In the process of engaging the first gear 225 with the first rack 228 and the second rack 229, the control device may detect whether the door is stressed, the stressed direction, the door opening time, and the like at certain intervals to perform corresponding operations, which is not described in detail.

The door closing process of the door driving device of the present embodiment is described below.

When the door body is closed to a certain degree, the first rack 228 is meshed with the first gear 225, and the user senses the state and can not operate any more. Meanwhile, the control device detects the switching value variation of the micro switch 290, controls the motor to rotate reversely to close the door, and the first gear 225 drives the first rack 228 and the second rack 229 to move until the push rod 212 returns to the initial position, at this moment, the control device detects the switching value variation of the micro switch 290 again, outputs a control signal, stops the motor, and completes the automatic door closing.

Next, a modified embodiment of the second embodiment will be described, and hereinafter, the second modified embodiment will be simply referred to.

The second modified embodiment is similar to the second embodiment in that: in the second embodiment, the driving stroke of the driving mechanism 208 is smaller than the moving stroke of the slide rail 230; in the second modified embodiment, the driving stroke of the driving mechanism 208 is equal to the moving stroke of the slide rail 230.

Specifically, the second modified embodiment is different from the second embodiment in the structure in the length of the rack. In the second embodiment, the first rack 228 and the second rack 229 have a short length, and the first rack 228 and the second rack 229 are switched from a state of being engaged with the first gear 225 to a state of being disengaged during the driving of the slide rail 230. In the second modified embodiment, the first rack 228 and the second rack 229 are longer in length, and the first rack 228 and the second rack 229 are always engaged with the first gear 225 throughout the entire movement stroke of the slide rail 230.

Therefore, the driving mechanism 208 can automatically drive the door body to be completely opened, manual operation of an operator is not needed, and labor is saved and intelligence is improved.

In the second modified embodiment, the control device detects whether the door body is stressed during the movement, and if so, the control device controls the driving mechanism 208 to stop working.

The second modified example is different from the first embodiment in that: in the first embodiment, the control device detects whether the door body is stressed or not in the movement process after the first driving mechanism 110 finishes working; in the second modified embodiment, the control device can detect whether the door body is stressed in the movement process in real time or at intervals according to needs. If the force is applied, the control device controls the driving mechanism 208 to stop working.

As in the first embodiment, the door driving device is provided with a signal detection device 240, the signal detection device 240 sends a door force direction signal to the control device, and the control device controls the driving mechanism 208 to drive the door to move along a direction opposite to the force direction or in an opposite direction. And will not be described in detail.

The signal detection device 240 of the second modified example has the same structure as the first embodiment, and is not described again.

As in the first embodiment, when the control device detects that the time for opening the door body exceeds the preset value, the control device sends an automatic door closing signal to the driving mechanism 208, and the driving mechanism 208 drives the door body to close. Similarly, the control device detects that the signal of the signal detection device 240 is unchanged within a period of time, and the driving mechanism 208 drives the door body to close. No further description is given.

The door opening and closing process of the second modified example is simpler than that of the second embodiment, does not need manual operation of a user, and is completed by controlling the driving mechanism 208 by the control device in the whole process, which is not described again.

Fig. 13 to 19 show an apparatus 300 according to a third embodiment of the present invention, and a door driving device for driving a door of the apparatus 300 to move.

The main differences between the door driving device of the present embodiment and the second embodiment include:

first, the drive mechanism for closing the door is different. In a second embodiment, the driving mechanism includes a door opening driving mechanism and a door closing driving mechanism, the door opening driving mechanism and the door closing driving mechanism have the same structure, the motor rotates forwards to open the door, and the motor rotates backwards to close the door. In this embodiment, the driving mechanism includes a door opening driving mechanism and a door closing driving mechanism, and the door opening driving mechanism and the door closing driving mechanism have different structures. The door opening driving mechanism includes a motor and the door closing driving mechanism includes an elastic member 370. Specifically, the rear end of the push rod 312 is connected with an elastic member 370, the motor rotates forward to open the door, in the door opening process, the push rod 312 drives the elastic member 370 to move, and the elastic member 370 is stretched; in the door closing process, the elastic element 370 recovers deformation to pull the push rod to reset so as to close the door.

Second, the specific structure of the driving mechanism is different. In the driving mechanism of the second embodiment, the first transmission piece is a gear, and the second transmission piece is a first rack and a second rack which are arranged oppositely; in this embodiment, the first transmission member 321 is a slider 371, and the second transmission member 322 is a claw 376.

The driving mechanism 308 of the present embodiment is described in detail below.

The drive mechanism 308 includes a door opening drive mechanism and a door closing drive mechanism.

The door opening driving mechanism comprises a driving source 323, a first transmission piece 321 driven by the driving source 323, and a second transmission piece 322 which is in transmission fit with the first transmission piece 321 and is fixed relative to the door body.

The driving source 323 includes a motor 314, a push rod 312, a transmission body for transmitting and connecting the motor 314 and the push rod 312, a micro switch 390 interlocked with a link in the transmission body, and a PCB 391 connected to the micro switch 390, as in the second embodiment. And will not be described in detail.

Unlike the second embodiment, in the present embodiment, the first transmission member 321 is a slider 371, and the second transmission member 322 is a claw 376.

The slider 371 is connected to the push rod 312 and is driven by the push rod 312 to translate. The slider 371 includes a sliding member 372 and a catching member 373 connected to each other. The slider 372 is fixedly connected to the push rod 312 and translates with the push rod 312. The clamping member 373 is pivotally connected to the sliding member 372, and a clamping groove 374 is formed on the clamping member 373. The latch 376 is fixed to the upper rail 333, and the latch 376 can be latched to the latch 374 or disengaged from the latch 374.

That is to say, the second transmission member 322 and the first transmission member 321 have two matching states, in the first state, the second transmission member 322 is engaged with the first transmission member 321 and drives the door body to move, and in the second state, the second transmission member 322 is disengaged from the first transmission member 321.

Specifically, in the first state, the claw 376 is clamped in the clamping groove 374 of the slider 371, and the push rod 312 drives the slider 371 and the claw 376 to move along with the slider 371, so that the upper rail 333 moves along with the slider and finally the door body moves along with the slider.

In the second state, the clamping member 373 pivots relative to the sliding member 372, the clamping claw 376 is disengaged from the clamping groove 374, the pushing rod 312 no longer drives the clamping claw 376, and the user manually opens and closes the door.

The moving stroke of the slider 371 is smaller than that of the slide rail 330. That is, the door body is automatically opened or closed within the movement stroke of the slider 371, and is manually opened or closed by the user outside the movement stroke range of the slider 371.

In order to guide the movement of the sliding block 371, in this embodiment, the door driving device further includes a guide groove 360 in sliding fit with the sliding block 371, and the guide groove 360 includes a first extension segment 361 and a second extension segment 362 which are mutually communicated and arranged at an angle. The extending direction of the first extending segment 361 is parallel to the extending direction of the sliding rail 330. The engaging member 373 of the slider 371 has a cylindrical body 375 that can slide in the guide groove 360.

In this embodiment, the guide groove 360 is fixed to the fixed rail 331 of the slide rail 330. Specifically, the guide groove 360 is disposed on the guide 363, and the guide 363 is fixed to an end of the fixed rail 331 away from the door body.

Therefore, when the cylindrical body 375 moves in the first extension segment 361, the clamping jaw 376 is engaged with the clamping piece 373 of the sliding block 371, and the clamping jaw 376 moves to finally drive the door body to move, so that automatic door opening and closing are realized. When the cylinder 375 slides from the first extension 361 to the second extension 362, the catch 373 pivots relative to the slide 372, the latch 376 disengages from the catch 373, and the push rod 312 no longer drives the latch 376 to move, thereby no longer driving the door body to move. The user manually opens and closes the door.

The door-closing drive mechanism includes an elastic member 370.

In this embodiment, the elastic member 370 is connected to an end of the push rod 312 of the door opening driving mechanism, which is away from the slider 371.

After the door opening signal is triggered, the motor of the driving mechanism 308 receives the control signal output by the control device, the motor rotates forward to drive the push rod 312 to push out, the push rod 312 pushes the slider 371, the claw 376 and the upper rail 333 to move, and meanwhile, the push rod 312 pulls the elastic member 370, and the elastic member 370 is stretched.

When the push rod 312 is pushed to the maximum position, the door body is automatically opened for a certain distance. When the control device detects the change of the switching value of the micro switch 390, the control device controls the motor to stop, at this time, the engaging member 373 of the slider 371 pivots relative to the sliding member 372, the cylinder 375 slides from the first extension 361 into the second extension 362, the push rod 312 stays at the maximum position, and the elastic member 370 is also fixed at the deformed position.

Subsequently, the user manually opens the door body to a required position.

The user closes the door body manually, and when the door body closed to a certain extent, claw 376 and the joint 373 of slider 371 meshing drive cylindricality body 375 and slide into first extension 361 from second extension 362, and elastic component 370 deformation resumes and stimulates push rod 312 to reset, realizes a body self-closing.

In this embodiment, if the door is automatically opened by malfunction or the door is not closed tightly by the user, the control device detects that the door is still not closed after the set time is exceeded. The control device will send an automatic door closing signal to the driving mechanism 308, and then the motor will stop after rotating reversely for 1-2 seconds, the cylindrical body 375 on the clamping piece 373 of the sliding block 371 slides into the first extending section 361 from the second extending section 362, the elastic piece 370 deforms and recovers, and the push rod 312 is pulled to reset, so that the door body is automatically closed.

Therefore, the claw 376 is engaged with the clamping piece 373 of the slider 371 again, and it is possible that when the user closes the door, the door body drives the upper rail 333 to withdraw, so as to drive the claw 376 to be engaged with the clamping piece 373 of the slider 371 again. It is also possible that the control device detects that the time for opening the door body exceeds a preset value, the control device sends an automatic door closing signal to the driving mechanism 308, and then the control device controls the motor to rotate reversely for a period of time (e.g. 1 to 2 seconds) and then stop, so as to drive the claw 376 to engage with the clamping piece 373 of the slider 371 again.

Fig. 20 and 21 show a door driving device for providing movement of a door of a driving apparatus according to a fourth embodiment of the present invention.

The main differences between the door driving device of the present embodiment and the third embodiment include:

first, the drive mechanism for closing the door is different. In a third embodiment, the drive mechanism includes a door opening drive mechanism and a door closing drive mechanism, and the door opening drive mechanism and the door closing drive mechanism are different in structure. The door opening driving mechanism comprises a motor, and the door closing driving mechanism comprises an elastic piece. Specifically, the motor corotation realizes opening the door, and the in-process of opening the door, the push rod drives the elastic component motion, and the elastic component is elongated, and in-process of closing the door, the elastic component resumes deformation pulling push rod and resets and realize closing the door. In this embodiment, the driving mechanism includes a door opening driving mechanism and a door closing driving mechanism, the door opening driving mechanism and the door closing driving mechanism have the same structure, the door is opened by the forward rotation of the motor, and the door is closed by the reverse rotation of the motor.

Second, the microswitch functions differently.

The microswitch of the third embodiment has the same function as that of the second embodiment, and determines whether the movement of the push rod is in place. In the door opening process, when the push rod is pushed to the right position, the switching value of the microswitch is changed, the control device receives the switching value change signal of the microswitch, the push rod is judged to be pushed to the right position, and the control device controls the motor to stop working. In the door closing process, when the push rod returns to the initial position, the switching value of the microswitch changes, the control device receives the switching value change signal of the microswitch, judges that the push rod returns to the initial position, and controls the motor to stop working.

In this embodiment, the microswitch 490 has two functions: the first function is the same as the microswitch of the third embodiment, and is used for judging whether the push rod 412 is in place; the second function is as follows: like the second gear and the angle encoder in the first embodiment, the microswitch 490 serves as a signal detection means for determining the operation tendency of the user.

In this embodiment, the trigger point of the microswitch 490 is set at a critical position of on and off. When the user opens or closes the door manually, the micro switch 490 will move from the critical position to the closed or open position, and the control device detects the change, and can determine whether the movement trend of the user is opening or closing the door.

Specifically, after the user triggers the automatic door opening signal, the motor of the door driving device receives the control signal output by the control device, and the motor rotates forward to drive the push rod 412 to push out. When the push rod 412 is pushed to a specified maximum distance, the control device detects that the micro switch 490 reaches a trigger point of the on and off critical positions, and the control device controls the motor to stop working.

If the user continues to pull the drawer outward manually, the slider 471 connected to the end of the push rod 412 continues to move forward by a small distance, and the cylindrical body 475 of the slider 471 slides from the first extension 461 of the guide groove 460 into the second extension 462. In the process of forward movement of the push rod 412, the transmission gear engaged with the push rod is driven to rotate at a small angle to drive the connecting rod to move, and finally the switching value of the micro switch 490 changes, namely, the micro switch moves from a trigger point to a closed position.

After the user finishes fetching the object, the door body is manually closed, when the door body is closed to a certain degree, the claw 476 is meshed with the clamping piece 473 of the sliding block 471, the control device detects that the switching value of the microswitch 490 changes, and the push rod 412 is judged to be pushed back manually; when the push rod 412 moves backward, the cylindrical body 475 is driven to slide into the first extension section 461 from the second extension section 462, the control device detects that the switching value of the micro switch 490 changes again, it is determined that the door needs to be closed, the control device outputs a driving signal, and the motor rotates backward to drive the push rod 412 to return to the initial position, so as to automatically close the drawer door. When the push rod 412 returns to the initial position, the control device detects that the switching value of the micro switch 490 changes, and outputs a control signal to stop the motor.

It should be understood that although the present description is described in terms of embodiments, not every embodiment includes only a single technical solution, and such description is merely for clarity, and a person skilled in the art should make the description as a whole, and the technical solutions in the embodiments may be appropriately combined, for example, the driving source and the transmission mechanism for driving the slide rail in the first and second embodiments may be replaced with each other, and such combinations may form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A door body driving device is used for driving a door body of equipment and comprises a driving mechanism for driving the door body to move and a sliding rail driven by the driving mechanism, wherein the door body is connected with the sliding rail; the slide rail includes the fixed rail that relative equipment is fixed, the relative fixed rail slides the upper rail that sets up, equipment or be equipped with controlling means on the door body drive arrangement, its characterized in that: the control device detects that the time for opening the door body exceeds a preset value, the control device sends an automatic door closing signal to the driving mechanism, and the driving mechanism drives the door body to close;

the driving mechanism comprises a door opening driving mechanism and a door closing driving mechanism, wherein the door opening driving mechanism comprises a driving source, a first transmission piece driven by the driving source, and a second transmission piece which is in transmission fit with the first transmission piece and is fixed relative to the door body;

the driving source comprises a motor, a push rod and a transmission body for driving and connecting the motor and the push rod; the first transmission piece is a sliding block, the sliding block comprises a sliding piece and a clamping piece which are connected with each other, and the sliding piece is fixedly connected with the push rod and moves horizontally along with the push rod; the clamping piece is pivotally connected with the sliding piece, and a clamping groove is formed in the clamping piece;

the second transmission part is a clamping jaw which is fixed on the upper rail and can be clamped in the clamping groove and also can be separated from the clamping groove;

a guide piece is fixed at one end of the fixed rail, which is far away from the door body, a guide groove is arranged on the guide piece, and the guide groove comprises a first extension section and a second extension section which are mutually communicated and arranged in an angle manner; the extending direction of the first extending section is parallel to the extending direction of the sliding rail, and a clamping piece of the sliding block is provided with a cylindrical body capable of sliding in the guide groove;

when the cylindrical body moves in the first extension section, the clamping jaws are meshed with the clamping pieces of the sliding blocks, and the clamping jaws move to finally drive the door body to move, so that automatic door opening and closing are realized; when the cylindrical body slides into the second extending section from the first extending section, the clamping piece pivots relative to the sliding piece, the clamping claw is disengaged from the clamping piece, and the push rod does not drive the clamping claw to move any more.

2. The door body driving apparatus according to claim 1, wherein: the door opening driving mechanism and the door closing driving mechanism are identical in structure and respectively comprise the motor and a transmission part driven by the motor, the motor rotates forwards to drive the door body to be opened, and the motor rotates backwards to drive the door body to be closed.

3. The door body driving device according to claim 1, wherein: the door opening driving mechanism and the door closing driving mechanism are different in structure, the door closing driving mechanism comprises an elastic piece, the motor drives the door body to open and stretch the elastic piece, and the elastic piece resets and closes the door body.

4. The door body driving device according to claim 3, wherein: the elastic piece moves along with the first transmission piece.

5. The door body driving device according to claim 4, wherein: after the door opening driving mechanism drives the door body to be opened, the first transmission piece and the second transmission piece are disengaged, and the elastic piece is stretched to a specific position and clamped.

6. The door body driving device according to claim 5, wherein: after the control device sends an automatic door closing signal to the driving mechanism, the control device controls the motor to rotate reversely for a period of time, the first transmission piece and the second transmission piece are meshed again, and the elastic piece is separated from the specific position and pulls the door body to close.

7. The door body driving device according to claim 5, wherein: the elastic piece is connected with the push rod.

8. The door body driving apparatus according to claim 5, wherein: when the cylindrical body slides into the second extending section from the first extending section, the clamping jaw is separated from the sliding block, and the elastic piece is clamped.

9. The door body driving device according to claim 1, wherein: the door body is opened through a first section of stroke and a second section of stroke in succession, the first section of stroke is smaller than the second section of stroke, and the control device detects the opening time of the door body after the first section of stroke is finished.

10. A refrigerator comprises a door body, and is characterized in that: the refrigerator is provided with the door body driving device according to any one of claims 1 to 9.